Access Point Processor Sub-Channel Segmentation
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Solution Overview
Problem
In high-density user environments, such as stadiums, existing WLAN systems face capacity overload and degraded quality of service due to shared IEEE channels being overwhelmed by a large number of users, leading to interference and corrupted signals.
Innovation Solution
The implementation of a signal processor that divides the wireless spectrum into master channels with unique sub-channels, each comprising distinct subcarriers, allowing access points to simultaneously transmit and receive on multiple sub-channels and manage station associations to minimize interference and maximize bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple users share a single IEEE channel in high-density environments, then channel capacity is overwhelmed and quality of service is degraded, but dividing the channel into sub-channels increases system complexity
Solution Approach 1:
The patent divides a single IEEE channel into multiple sub-channels, each carrying independent data streams. This segmentation allows multiple users to be served simultaneously on different sub-channels within the same physical channel, effectively increasing channel capacity and reducing congestion in high-density environments.
Solution Approach 2:
The patent implements nested signal processing where sub-channel processing is contained within the master channel framework. The signal processor handles multiple sub-channels through hierarchical processing, with each sub-channel processed independently but managed within the overall channel structure, thereby increasing capacity while controlling complexity.
2Productivity
If access points transmit on the same IEEE channel simultaneously, then bandwidth utilization increases, but signal interference and corruption occur
Solution Approach 1:
The patent segments the IEEE channel into multiple orthogonal sub-channels with distinct subcarrier sets. This allows multiple access points to transmit simultaneously on different sub-channels without interference, as each sub-channel processes independent data streams through separate subcarrier processing.
Solution Approach 2:
The patent introduces subcarrier processing as an intermediary mechanism between physical channel transmission and data reception. By processing signals at the subcarrier level with orthogonal subchannel assignments, the system enables simultaneous transmissions from multiple access points while maintaining signal integrity through orthogonal subcarrier separation.
3Reliability
If stations associate with the strongest access point, then connection reliability improves, but residual interference from distant access points on the same channel increases
Solution Approach 1:
The patent segments the channel into multiple sub-channels with orthogonal subcarriers. Stations can associate with the strongest access point while simultaneously utilizing multiple sub-channels for data transmission. The orthogonal subcarrier structure ensures that even when multiple access points are present, residual interference is minimized because each sub-channel processes independent subcarriers.
Data Source
AI summary
A channel access processor for an access point operates in a frequency spectrum which is divided into master channels, each master channel further having a plurality of sub-channels, each sub-channel capable of supporting wireless LAN communications independently from any other said sub-channel of the master channel. Each master channel is thereby associated with a plurality of sub-channels, and the sub-channels each have an associated bandpass filter and mixer frequency specific to that sub-channel, thereby allowing a plurality of independent wireless communications sessions to simultaneously take place over the multiple sub-channels of the master channel of the access point.